You got a new iPhone! Maybe it's a slightly bigger iPhone 6 or a bigger-still 6 Plus. Either way, what now? Here's what you need to get started with your new iPhone, whether you're a first-timer or an iOS pro.

Charging Tip

As with any smartphone, the iPhone's weakest link is its battery. Treating your Li-ion with respect will not only extend the life and usefulness of your new phone, but also boost its resale value—just in case you decide to dump it back on the market prematurely.

Let your phone get all the way to zero once, when you first get it, to calibrate the battery. From there on out try to keep it north of 50 percent as much as possible.

Top it off whenever you can. Li-ion batteries do well with little bursts of charge now and then, so don't be afraid to charge in fits and starts whenever you get the chance.

Don't let it get too hot. The lamest way to murder your battery is by letting it get too warm. So don't like, leave it near the stove, you dingus.

A Quick iPhone 6 Overview

The iPhone 6 and 6 Plus's buttons, cameras, and layout will be pretty familiar to anyone who's owned—or simply held—an iPhone in the last few years. Just so you can be better acquainted with your new pocket buddy, here's a quick look at where everything is (and what everything does).

There are a couple of changes from previous models, though. First and foremost, the power button migrates from its iPhone-traditional top-right corner down to the side of the phone. And then, of course, no matter which iPhone you got, it's going to be bigger than previous models.

The biggest change you'll get hit in the face with (if you haven't updated already) is the flashy new digs of iOS 8, but more on that a little later.

Start Up, Sync Up

The easiest part of owning an iPhone is activating it. But making it actually do what you want can be a little trickier.

The first thing you'll see when you start your iPhone will be a Setup Assistant, which walks you through the process of making your iPhone yours. That's where you'll indicate your preferred Wi-Fi network, enter or create your Apple ID, set up iCloud, and decide whether you want to activate Find My Phone (yes) or Location Services (probably). Don't sweat this part; you can go back into Settings and adjust your choices whenever you want.

Then comes the fun part; filling up your phone with all your contacts, email, movies, apps, and more. You've got two choices here.

The Old-Fashioned Way: If you've already got an iPhone—or another Apple device like an iPad or iPod—all of your settings and preferences, contacts, apps, and content are already stored on iTunes on your desktop. Easy! So pop over and download the latest version of iTunes if you don't already have it. Then, connect your phone to your computer with the Lightning cable that came with it, and start syncing.

The New-Fangled Way: You can also simply sync up your iPhone over iCloud. During setup, you'll need to connect to Wi-Fi, and select whether you want to set up as a new device, restore from an iCloud backup, or restore from an iTunes backup. Whatever you choose, you simply enter your Apple ID login information (you have to pick just one if you have multiple, though you can change it later). If you're restoring from a backup, your phone will restart, and all of your previous settings will be in place.

If you haven't used iTunes before, you'll want to add your media to it; that's a simple click and drag operation, or you can assimilate entire folders quickly by going to File > Add to Library.

Remember, you probably don't need all of your stuff, since you can listen to most music through services like Rdio or Spotify (subscription required), and your phone can access a lot of videos or other docs that live on your hard drive through iCloud, Dropbox, SkyDrive, and other cloud services. It's good to save as much storage space as you can, especially if you have a 16GB model; you'll find that you fill up on apps pretty quickly.

If you're already set up with iTunes, note that it will sync everything in your account to your phone by default. To be more selective, you can switch over to manual mode by clicking on the iPhone icon that shows up in the upper righthand corner of your screen. Scroll down to the bottom of the options page, and select Sync only checked songs and videos.

This is especially useful for music if you've got a massive music library, and the controls are granular enough that you can include (or exclude) specific artists, genres, albums, or playlists. In other words, you don't have to click through song by song. To save space on videos, you can opt for the much smaller standard definition versions of files, rather than their hefty HD counterparts.

Wiping Your Old Phone

This one's important. If you are selling your old phone, you need to wipe its data. And not just that. If you are selling an iPhone, you've got to make sure that iMessages stop getting sent to that phone. Here's how you do that.

First, remove your SIM card. If you've got a Verizon or Sprint iPhone, you should be able to deactivate your phone through the carrier website, or you can call them and have it done over the phone. This next step is a big one: Go to Settings > Messages > iMessage and turn off iMessage. This will stop your messages from going to your old phone, which, puzzlingly, can still happen even after you've erased and deactivated that phone.

Lastly, go to Settings > General > Reset > Erase All Content and Settings. There you can erase everything on your phone, and safely sell your device, or give it to someone as a hand-me-down, without worrying about them going through your messages.

Get the Most Out of iOS 8

Remember, you didn't just buy an iPhone, you bought Apple's fancy new operating system.

So that's about it! Your iPhone is fully set up, loaded up with all your favorite stuff, ready fill its bigger (perhaps huge-er) screen with even more goodness. And if there are any helpful hints you've come across that we missed here, let us know below!